Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
2.30-2.503.00-3.25
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
Perfect on (001)
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
4.5-54
2
10
👆🏻
Chemical Composition
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
CaF2